CN113607733A - Combined visual inspection system and working method for PCB production - Google Patents

Combined visual inspection system and working method for PCB production Download PDF

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Publication number
CN113607733A
CN113607733A CN202110907180.1A CN202110907180A CN113607733A CN 113607733 A CN113607733 A CN 113607733A CN 202110907180 A CN202110907180 A CN 202110907180A CN 113607733 A CN113607733 A CN 113607733A
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arc
semi
pcb
circular
constraint
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CN202110907180.1A
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Chinese (zh)
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宋志龙
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Individual
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/94—Investigating contamination, e.g. dust
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
    • G01N21/956—Inspecting patterns on the surface of objects
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/94—Investigating contamination, e.g. dust
    • G01N2021/945—Liquid or solid deposits of macroscopic size on surfaces, e.g. drops, films, or clustered contaminants
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
    • G01N21/956—Inspecting patterns on the surface of objects
    • G01N2021/95638—Inspecting patterns on the surface of objects for PCB's

Abstract

The invention discloses a combined visual detection system for PCB production, which is characterized in that: the X-axis motor and the Y-axis motor are fixedly arranged, and the X-axis of the X motor is horizontally parallel to the Y-axis of the Y motor; the invention has simple structure, can obtain a complete pattern only by shooting a local range, and can also achieve a high-definition visual pattern in a camera with low resolution, thereby obtaining a visual detection system which does not need a PCB (printed circuit board) to fall into the sight range of an industrial camera.

Description

Combined visual inspection system and working method for PCB production
Technical Field
The invention belongs to the field of PCB detection.
Background
The PCB circuit board with the semi-arc shape is used in electric appliances with various arc-shaped shells, such as a low-voltage ceiling fan control board, a semi-disc type 4-way conductive slip ring, a wireless charger, an annular LED lamp and the like; the existing visual detection system for the PCB often falls the whole PCB into the visual range of an industrial camera, so that the industrial camera is required to have enough wide angle and resolution, and further the industrial camera with expensive resolution is required, the large cost of the industrial camera is increased, and the visual detection system without the whole PCB falling into the visual range of the industrial camera is designed on the basis of the PCB with the semicircular arc shape.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides a combined visual detection system and a working method for PCB production with low cost.
The technical scheme is as follows: in order to achieve the above object, the combined visual inspection system for PCB production of the present invention is characterized in that: the X-axis motor and the Y-axis motor are fixedly arranged, and the X-axis of the X motor is horizontally parallel to the Y-axis of the Y motor;
the X rotating shaft is vertically connected with an X rocker arm, and the Y rotating shaft is vertically connected with a Y rocker arm; the tail end of the X rocker arm is fixedly connected with an X restraint unit, and the tail end of the Y rocker arm is fixedly connected with a Y restraint unit;
the detection device also comprises an X semi-arc PCB and a Y semi-arc PCB which are waiting for detection and have the same structure, wherein the X semi-arc PCB and the Y semi-arc PCB are respectively constrained on the X constraint unit and the Y constraint unit;
the rotation of the X rotating shaft can drive the X restraint unit to rotate along the axis of the X rotating shaft through the X rocker arm;
the rotation of the Y rotating shaft can drive the Y constraint unit to rotate along the axis of the Y rotating shaft through the Y rocker arm.
Further, when the X semi-circular PCB is constrained in the X constraining unit, the X semi-circular PCB can only freely rotate along the circle center of the X semi-circular PCB;
when the Y semi-arc PCB is restrained on the Y restraining unit, the Y semi-arc PCB can only freely rotate along the center of the circle of the Y semi-arc PCB;
recording two arc ends of the X semi-arc PCB as two X arc ends, and recording two arc ends of the Y semi-arc PCB as two Y arc ends;
the device also comprises an arc PCB plate end limiter;
the circular arc PCB end limiter enables two X circular arc ends of an X semi-circular arc PCB on the X constraint unit to be superposed under an axis view angle along the X rotating shaft;
the circular arc PCB board end limiter can also enable two Y circular arc ends of a Y semi-circular arc PCB board on the Y constraint unit to coincide under the axis view angle along the Y rotating shaft.
Further, on the basis that the X rocker arm and the Y rocker arm are both upward in the initial state, the X constraint unit and the Y constraint unit respectively drive the X semi-circular arc PCB and the Y semi-circular arc PCB to move to be spliced into a whole circular ring structure under the combined action of the anticlockwise rotation of the X rotating shaft, the clockwise rotation of the Y rotating shaft and the end limiter of the circular arc PCB; the device also comprises a fixedly installed visual camera which can shoot a local range of the whole circular ring structure.
The X motor and the Y motor are respectively and fixedly arranged on the motor bracket; the vision camera is fixed on the motor bracket through a camera bracket; when the X semi-circular arc PCB and the Y semi-circular arc PCB move to be spliced into a whole circular ring structure, the vision camera is just right below the arbitrary connection part of the X semi-circular arc PCB and the Y semi-circular arc PCB.
Further, the visual camera is a CMOS camera.
Furthermore, the end limiter of the arc PCB comprises a lifter fixed on the mechanism base, and the axis of a vertical lifting rod of the lifter passes through the circle center of a whole circular ring structure formed by splicing an X semi-arc PCB and a Y semi-arc PCB;
the vertical lifting rod is fixedly connected with a long-strip limiting vertical plate, the length direction of the long-strip limiting plate is parallel to the axis of the X rotating shaft/Y rotating shaft, and the lower end of the long-strip limiting plate is in a pointed shape with a downward sharp end under the axis view angle along the X rotating shaft/Y rotating shaft; two side surfaces of the long-strip-shaped limiting plate are limiting surfaces;
when two X arc ends of the X semi-arc PCB are in contact with the limiting surface on the right side of the long-strip-shaped limiting plate, the two X arc ends of the X semi-arc PCB are overlapped under the axial view angle along the X rotating shaft;
when two Y circular arc end portions of the Y semi-circular arc PCB are in contact with the limiting surface on the left side of the long strip-shaped limiting plate, the two Y circular arc end portions of the Y semi-circular arc PCB are overlapped under the axis view angle along the Y rotating shaft.
Further, the X restraint unit comprises an X restraint wheel bracket, and the X restraint wheel bracket is fixed at the tail end of the X rocker arm; the device also comprises two X outer constraint rollers and two X inner constraint rollers; the two X outer constraint idler wheels and the two X inner constraint idler wheels are rotatably arranged on the X constraint wheel bracket; the Y constraint unit comprises a Y constraint wheel bracket, and the Y constraint wheel bracket is fixed at the tail end of the Y rocker arm; the device also comprises two Y external constraint rollers and two Y internal constraint rollers; the two Y outer constraint idler wheels and the two Y inner constraint idler wheels are rotatably arranged on the Y constraint wheel bracket; the outer rings of the X outer constraint roller, the X inner constraint roller, the Y inner constraint roller and the Y outer constraint roller are all provided with annular wheel grooves, the groove bottoms of the wheel grooves are all made of rubber elastic materials, and the width of each wheel groove is consistent with the plate thickness of the X semicircular arc PCB and the Y semicircular arc PCB; the outer arc edge of the X semi-circular PCB is clamped into the wheel grooves of the two X outer constraint rollers and is in rolling fit with the two X outer constraint rollers; the inner arc edge of the X semi-circular PCB is clamped into the wheel grooves of the two X inner constraint rollers and is in rolling fit with the two X inner constraint rollers; the outer arc edge of the Y semi-arc PCB is clamped into the wheel grooves of the two Y outer constraint rollers and is in rolling fit with the two Y outer constraint rollers; the inner arc edge of the Y semi-circular PCB is clamped into the wheel grooves of the two Y inner constraint rollers and is in rolling fit with the two Y inner constraint rollers;
and the Y constraint wheel bracket is fixedly provided with a roller driving motor through an X motor bracket, and the roller driving motor is in driving connection with any one Y internal constraint roller.
Further, the working method of the combined visual inspection system for PCB production comprises the following steps:
step one, in an initial state, an X rocker arm and a Y rocker arm are both upward in the initial state;
step two, clamping the outer arc edge of the X semi-circular PCB into the wheel grooves of the two X outer constraint rollers and in rolling fit with the two X outer constraint rollers, and clamping the inner arc edge of the X semi-circular PCB into the wheel grooves of the two X inner constraint rollers and in rolling fit with the two X inner constraint rollers; therefore, the X constraint unit can constrain the X semi-arc PCB; at the moment, two X arc ends of the X semi-arc PCB are upward, and the X semi-arc PCB can freely rotate along the center of the circle of the X semi-arc PCB, so that the X semi-arc PCB is not completely positioned, and the two X arc ends of the X semi-arc PCB are not completely superposed under the axial view angle along the X rotating shaft; at the moment, the X rotating shaft is controlled to rotate anticlockwise, so that the X semi-circular arc PCB restrained by the X restraining unit also rotates anticlockwise along the axis of the X rotating shaft until one of the two X circular arc ends of the X semi-circular arc PCB contacts with the limiting surface on the right side of the long strip-shaped limiting plate, the limiting surface can form a thrust force on the contacted X circular arc end, the X semi-circular arc PCB rotates adaptively along the center of the circle of the X semi-circular arc PCB, and the two X circular arc ends of the X semi-circular arc PCB coincide under the axial view angle along the X rotating shaft until the two X circular arc ends of the X semi-circular arc PCB contact with the limiting surface on the right side of the long strip-shaped limiting plate, and the X semi-circular arc PCB is positioned completely;
meanwhile, the outer arc edge of the Y semi-arc PCB is clamped into the wheel grooves of the two Y outer constraint rollers and is in rolling fit with the two Y outer constraint rollers; the inner arc edge of the Y semi-arc PCB is clamped into the wheel grooves of the two Y inner constraint rollers and is matched with the two Y inner constraint rollers in a rolling way; therefore, the Y constraint unit can constrain the Y semi-arc PCB; at the moment, the two Y arc ends of the Y semi-arc PCB are upward, and the Y semi-arc PCB can also freely rotate along the center of the circle of the Y semi-arc PCB, so that the Y semi-arc PCB is not completely positioned, and the two Y arc ends of the Y semi-arc PCB are not completely superposed at the moment in the axis view angle of the Y rotating shaft; at the moment, the Y rotating shaft is controlled to rotate clockwise, so that the Y semi-arc PCB restrained by the Y restraining unit also rotates clockwise along the axis of the Y rotating shaft until one of the two Y arc ends of the Y semi-arc PCB contacts the limiting surface on the left side of the long strip-shaped limiting plate, the limiting surface can form a thrust force on the contacted Y arc end, the Y semi-arc PCB rotates adaptively along the center of the circle of the Y semi-arc PCB, and when the two Y arc ends of the Y semi-arc PCB contact the limiting surface on the left side of the long strip-shaped limiting plate, the two Y arc ends of the Y semi-arc PCB are overlapped under the axis view angle along the Y rotating shaft, and the Y semi-arc PCB is positioned completely;
step three, controlling the long-strip-shaped limiting vertical plate to gradually rise by the lifter, simultaneously controlling the X rotating shaft to rotate anticlockwise, and controlling the Y rotating shaft to rotate clockwise, so that two X arc ends of the X semi-arc PCB are always in contact with the limiting surface on the right side of the long-strip-shaped limiting plate, and two Y arc ends of the Y semi-arc PCB are always in contact with the limiting surface on the left side of the long-strip-shaped limiting plate; because the lower end of the strip-shaped limiting plate is sharp with the sharp end facing downwards under the axis visual angle along the X rotating shaft/Y rotating shaft, two X arc ends of the X semi-arc PCB and two Y arc ends of the Y semi-arc PCB are gradually close to each other in the process that the strip-shaped limiting vertical plate gradually rises until the lower end of the strip-shaped limiting plate rises to be higher than the two X arc ends of the X semi-arc PCB and the two Y arc ends of the Y semi-arc PCB, the two X arc ends of the X semi-arc PCB and the two Y arc ends of the Y semi-arc PCB are mutually contacted, and at the moment, the X semi-arc PCB and the Y semi-arc PCB are just spliced into a whole circular ring structure; if the X semi-arc PCB and the Y semi-arc PCB can not be spliced into a whole circle, at least one of the X semi-arc PCB and the Y semi-arc PCB is incorrect in size; after the X semi-arc PCB and the Y semi-arc PCB are spliced into a whole circular ring structure, the whole circular ring structure is formed by splicing the X semi-arc PCB and the Y semi-arc PCB, and the whole circular ring structure can only rotate along the circle center of the whole circular ring structure under the common constraint of the X constraint unit and the Y constraint unit;
starting a vision camera, wherein the vision camera shoots a local range of a whole circular ring structure formed by splicing the X semi-circular arc PCB and the Y semi-circular arc PCB, so that the vision camera obtains a plate surface image of the local range of the whole circular ring structure; controlling a roller driving motor, driving a Y inner constraint roller to rotate so as to drive the Y inner constraint roller to rotate under the action of rolling friction force to drive the whole circular ring structure formed by splicing an X semi-circular arc PCB and a Y semi-circular arc PCB to rotate a whole circle along the self circle center, and after the whole circular ring structure formed by splicing the X semi-circular arc PCB and the Y semi-circular arc PCB rotates a whole circle along the self circle center, the visual line range of a vision camera sweeps the whole lower surface of the whole circular ring structure formed by splicing the X semi-circular arc PCB and the Y semi-circular arc PCB, so that the front vision camera and the back vision camera obtain the whole image of the lower surface of the whole circular ring structure, and then the image is transmitted to an image processing system or a display screen so as to replace human eyes to judge whether the distance error, the shape of elements and the stained shape of each component on the X semi-circular arc PCB and the Y semi-circular arc PCB exist on the boards, thus, a period of visual inspection of the device is achieved.
Has the advantages that: the invention has simple structure, can obtain a complete pattern only by shooting a local range, and can also achieve a high-definition visual pattern in a camera with low resolution, thereby obtaining a visual detection system which does not need a PCB (printed circuit board) to fall into the sight range of an industrial camera.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the device (when the X rocker arm and the Y rocker arm are both upward);
FIG. 2 is a perspective view of FIG. 1;
FIG. 3 is an enlarged schematic view of the left portion of FIG. 2;
FIG. 4 is an enlarged schematic view of the right portion of FIG. 2;
FIG. 5 is a schematic diagram when two X arc ends of the X semi-arc PCB contact the limiting surface on the right side of the long-strip limiting plate and two Y arc ends of the Y semi-arc PCB contact the limiting surface on the left side of the long-strip limiting plate in the step II;
FIG. 6 is a front view (viewed along the axis of the X and Y axes) of FIG. 5;
FIG. 7 is a schematic view of the strip-shaped limiting vertical plate gradually rising in the step III;
FIG. 8 is a schematic view of a full circular ring structure formed by splicing the X semi-circular arc PCB and the Y semi-circular arc PCB in the step III;
fig. 9 is a front view of fig. 8.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The combined visual inspection system for PCB production as shown in fig. 1 to 9 comprises an X motor 106 and a Y motor 103 which are fixedly installed, wherein the axis of an X rotating shaft 108 of the X motor 106 is parallel to the axis of a Y rotating shaft 104 of the Y motor 103 in parallel;
an X rocker arm 107 is vertically connected to the X rotating shaft 108, and a Y rocker arm 105 is vertically connected to the Y rotating shaft 104; the tail end of the X rocker arm 107 is fixedly connected with an X constraint unit 35, and the tail end of the Y rocker arm 105 is fixedly connected with a Y constraint unit 34;
the detection device also comprises an X semi-arc PCB 32 and a Y semi-arc PCB33 which are waiting for detection and have the same structure, wherein the X semi-arc PCB 32 and the Y semi-arc PCB33 are respectively constrained on the X constraint unit 35 and the Y constraint unit 34;
the rotation of the X rotating shaft 108 can drive the X constraint unit 35 to rotate along the axis of the X rotating shaft 108 through the X rocker arm 107;
the rotation of the Y rotating shaft 104 can drive the Y constraining unit 34 to rotate along the axis of the Y rotating shaft 104 through the Y rocker arm 105.
When the X semi-circular arc PCB 32 is constrained in the X constraining unit 35, the X semi-circular arc PCB 32 can only freely rotate along the center of the circle thereof;
when the Y semi-circular PCB33 is constrained on the Y constraining unit 34, the Y semi-circular PCB33 can only freely rotate along the center of the circle;
recording two arc ends of the X semi-arc PCB 32 as two X arc ends 113, and recording two arc ends of the Y semi-arc PCB33 as two Y arc ends 112;
the device also comprises an arc PCB plate end limiter;
the circular arc PCB end limiter enables two X circular arc ends 113 of the X semi-circular arc PCB 32 on the X constraint unit 35 to be overlapped under the axial view angle along the X rotating shaft 108;
the circular arc PCB panel end limiter also enables two Y circular arc ends 112 of the Y semi-circular arc PCB panel 33 on the Y constraining unit 34 to coincide at an axis view along the Y rotating shaft 104.
On the basis that the X rocker arm 107 and the Y rocker arm 105 are both upward in the initial state, the X constraint unit 35 and the Y constraint unit 34 respectively drive the X semi-circular arc PCB 32 and the Y semi-circular arc PCB33 to move to be spliced into a whole circular ring structure under the combined action of the anticlockwise rotation of the X rotating shaft 108, the clockwise rotation of the Y rotating shaft 104 and the end limiter of the circular arc PCB; also included is a fixedly mounted vision camera 131, the vision camera 131 being capable of capturing a partial range 130 of the full circular ring structure.
The mechanism comprises a mechanism base 110, wherein a motor bracket 111 is fixedly arranged on the mechanism base 110 through a vertical column 112, and the machine shells of the X motor 106 and the Y motor 103 are respectively and fixedly arranged on the motor bracket 111; the vision camera 131 is fixed on the motor bracket 111 through a camera bracket 132; when the X semi-circular arc PCB 32 and the Y semi-circular arc PCB33 move to be spliced into a complete circular ring structure, the vision camera 131 is just under any connection position of the X semi-circular arc PCB 32 and the Y semi-circular arc PCB 33.
The vision camera 131 is a CMOS camera.
The circular arc PCB end limiter comprises a lifter 109 fixed on the mechanism base 110, and the axis of a vertical lifting rod 102 of the lifter 109 passes through the circle center of a whole circular ring structure formed by splicing the X semi-circular arc PCB 32 and the Y semi-circular arc PCB 33;
the vertical lifting rod 102 is fixedly connected with an elongated limiting vertical plate 100, the length direction of the elongated limiting plate 100 is parallel to the axis of the X rotating shaft 108/Y rotating shaft 104, and the lower end of the elongated limiting plate 100 is a sharp shape 101 with a downward sharp end in the axis view along the X rotating shaft 108/Y rotating shaft 104; two side surfaces of the long-strip-shaped limiting plate 100 are limiting surfaces 101.1;
when the two X arc ends 113 of the X semi-arc PCB 32 contact the limiting surface 101.1 on the right side of the elongated limiting plate 100, the two X arc ends 113 of the X semi-arc PCB 32 are overlapped at the axial view angle along the X rotating shaft 108;
when the two Y arc ends 112 of the Y semi-arc PCB33 both contact the limiting surface 101.1 on the left side of the long strip limiting plate 100, the two Y arc ends 112 of the Y semi-arc PCB33 are overlapped at the axis view angle along the Y rotating shaft 104.
The X restraint unit 35 comprises an X restraint wheel bracket 16, and the X restraint wheel bracket 16 is fixed at the tail end of the X rocker arm 107; two X outer constraint rollers 17 and two X inner constraint rollers 15 are also included; the two X outer constraint rollers 17 and the two X inner constraint rollers 15 are rotatably arranged on the X constraint wheel bracket 16; the Y constraint unit 34 comprises a Y constraint wheel bracket 4, and the Y constraint wheel bracket 4 is fixed at the tail end of the Y rocker arm 105; the device also comprises two Y external constraint rollers 6 and two Y internal constraint rollers 7; the two Y outer constraint rollers 6 and the two Y inner constraint rollers 7 are rotatably arranged on the Y constraint wheel bracket 4; the outer rings of the X outer constraint roller 17, the X inner constraint roller 15, the Y inner constraint roller 7 and the Y outer constraint roller 6 are all provided with annular wheel grooves 5, the groove bottom of each wheel groove 5 is made of rubber elastic material, and the width of each wheel groove 5 is consistent with the plate thickness of the X semicircular arc PCB 32 and the Y semicircular arc PCB 33; the outer arc edge of the X semi-circular PCB 32 is clamped into the wheel grooves 5 of the two X outer constraint rollers 17 and is matched with the two X outer constraint rollers 17 in a rolling way; the inner arc edge of the X semi-circular PCB 32 is clamped into the wheel groove 5 of the two X inner constraint rollers 15 and is matched with the two X inner constraint rollers 15 in a rolling way; the outer arc edge of the Y semi-circular PCB33 is clamped into the wheel grooves 5 of the two Y outer constraint rollers 6 and is matched with the two Y outer constraint rollers 6 in a rolling way; the inner arc edge of the Y semi-circular PCB33 is clamped into the wheel grooves 5 of the two Y inner constraint rollers 7 and is in rolling fit with the two Y inner constraint rollers 7;
and the Y constraint wheel bracket 4 is fixedly provided with a roller driving motor 145 through an X motor bracket 146, and the roller driving motor 145 is in driving connection with any one Y inner constraint roller 7.
The working method and the working steps of the scheme are as follows, and the working method of the combined visual inspection system for PCB production comprises the following steps:
step one, in an initial state, an X rocker arm 107 and a Y rocker arm 105 are both upward in the initial state;
step two, clamping the outer arc edge of the X semi-circular PCB 32 into the wheel grooves 5 of the two X outer constraint rollers 17, and enabling the outer arc edge to be matched with the two X outer constraint rollers 17 in a rolling manner, clamping the inner arc edge of the X semi-circular PCB 32 into the wheel grooves 5 of the two X inner constraint rollers 15, and enabling the inner arc edge to be matched with the two X inner constraint rollers 15 in a rolling manner; thereby realizing the restraint of the X restraining unit 35 on the X semi-arc PCB 32; at this time, the two X arc end portions 113 of the X semi-arc PCB 32 are both upward, and since the X semi-arc PCB 32 can also freely rotate along the center of its own circle, the X semi-arc PCB 32 is not yet completely positioned, so that the two X arc end portions 113 of the X semi-arc PCB 32 at this time are not completely overlapped at the axial view angle along the X rotating shaft 108; at this time, the X rotating shaft 108 is controlled to rotate anticlockwise, so that the X semicircular arc PCB 32 constrained by the X constraining unit 35 also rotates anticlockwise along the axis of the X rotating shaft 108, until one of the two X arc ends 113 of the X semicircular arc PCB 32 contacts the limiting surface 101.1 on the right side of the elongated limiting plate 100, the limiting surface 101.1 forms a thrust on the contacted one X arc end 113, so that the X semicircular arc PCB 32 rotates adaptively along the center of the circle of the X semicircular arc PCB 32, until the two X arc ends 113 of the X semicircular arc PCB 32 contact the limiting surface 101.1 on the right side of the elongated limiting plate 100, the two X arc ends 113 of the X semicircular arc PCB 32 coincide with each other in an axial view along the X rotating shaft 108, and at this time, the X semicircular arc PCB 32 is completely positioned;
meanwhile, the outer arc edge of the Y semi-arc PCB33 is clamped into the wheel grooves 5 of the two Y outer constraint rollers 6 and is matched with the two Y outer constraint rollers 6 in a rolling way; the inner arc edge of the Y semi-arc PCB33 is clamped into the wheel grooves 5 of the two Y inner constraint rollers 7 and is matched with the two Y inner constraint rollers 7 in a rolling way; therefore, the Y constraint unit 34 is used for constraining the Y semi-arc PCB 33; at this time, the two Y arc ends 112 of the Y semi-arc PCB33 are both upward, and since the Y semi-arc PCB33 can also freely rotate along the center of its own circle, the Y semi-arc PCB33 is not yet completely positioned, so that the two Y arc ends 112 of the Y semi-arc PCB33 at this time are not completely overlapped in the axial view along the Y rotating shaft 104; at this time, the Y rotating shaft 104 is controlled to rotate clockwise, so that the Y semi-arc PCB33 constrained by the Y constraining unit 34 also rotates clockwise along the axis of the Y rotating shaft 104 until one of the two Y arc ends 112 of the Y semi-arc PCB33 contacts the limiting surface 101.1 on the left side of the strip-shaped limiting plate 100, the limiting surface 101.1 forms a thrust on the contacted one Y arc end 112, so that the Y semi-arc PCB33 rotates adaptively along the center of the circle thereof, until the two Y arc ends 112 of the Y semi-arc PCB33 contact the limiting surface 101.1 on the left side of the strip-shaped limiting plate 100, the two Y arc ends 112 of the Y semi-arc PCB33 coincide with each other in the view angle along the axis of the Y rotating shaft 104, and at this time, the Y semi-arc PCB33 is completely positioned;
step three, the lifter 109 controls the long-strip limiting vertical plate 100 to gradually rise, and at the same time controls the X rotating shaft 108 to rotate anticlockwise and the Y rotating shaft 104 to rotate clockwise, so that two X arc ends 113 of the X semi-arc PCB 32 are always in contact with the limiting surface 101.1 on the right side of the long-strip limiting plate 100, and two Y arc ends 112 of the Y semi-arc PCB33 are always in contact with the limiting surface 101.1 on the left side of the long-strip limiting plate 100; because the lower end of the elongated limiting plate 100 is a sharp 101 with a downward sharp end in the axial view along the X rotating shaft 108/Y rotating shaft 104, when the elongated limiting vertical plate 100 gradually rises, the two X arc ends 113 of the X semi-arc PCB 32 and the two Y arc ends 112 of the Y semi-arc PCB33 gradually approach each other until the lower end of the elongated limiting plate 100 rises to be higher than the two X arc ends 113 of the X semi-arc PCB 32 and the two Y arc ends 112 of the Y semi-arc PCB33, the two X arc ends 113 of the X semi-arc PCB 32 and the two Y arc ends 112 of the Y semi-arc PCB33 are already in contact with each other, and at this time, the X semi-arc PCB 32 and the Y semi-arc PCB33 are just spliced into a whole circle; if the X semi-arc PCB 32 and the Y semi-arc PCB33 cannot be spliced into a complete circle, it is indicated that at least one of the X semi-arc PCB 32 and the Y semi-arc PCB33 is incorrect in size; after the X semi-arc PCB 32 and the Y semi-arc PCB33 are spliced into a whole circular ring structure, the whole circular ring structure is formed by splicing the X semi-arc PCB 32 and the Y semi-arc PCB33, and the whole circular ring structure can only rotate along the center of the circle under the common constraint of the X constraint unit 35 and the Y constraint unit 34;
step four, starting the vision camera 131, and shooting a local range 130 of the whole circular ring structure formed by splicing the X semi-circular arc PCB 32 and the Y semi-circular arc PCB33 by the vision camera 131, so that the vision camera 131 obtains a plate surface image of the local range 130 of the whole circular ring structure; controlling the roller driving motor 145, the roller driving motor 145 drives a Y inner constraint roller 7 to rotate, so that the Y inner constraint roller 7 drives the full-circle structure formed by splicing the X semi-circular-arc PCB 32 and the Y semi-circular-arc PCB33 to rotate a full circle along the self circle center under the action of rolling friction force, the full-circle structure formed by splicing the X semi-circular-arc PCB 32 and the Y semi-circular-arc PCB33 rotates a full circle along the self circle center, the visual line range of the vision camera 131 sweeps the complete lower surface of the full-circle structure formed by splicing the X semi-circular-arc PCB 32 and the Y semi-circular-arc PCB33, so that the front vision camera 8 and the back vision camera 10 obtain a complete image of the lower surface of the full-circle structure, and then the image is transmitted to an image processing system or a display screen, thereby replacing human eyes to judge whether the error of the space between each component on the X semi-circular-arc PCB 32 and the Y semi-arc PCB33 exists or not, The shape of the element, and whether there is a stain on the board, thus achieving a period of visual inspection of the device.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.

Claims (8)

  1. The combined visual inspection system for PCB production is characterized in that: the device comprises an X motor (106) and a Y motor (103) which are fixedly installed, wherein the axis of an X rotating shaft (108) of the X motor (106) is horizontally parallel to the axis of a Y rotating shaft (104) of the Y motor (103);
    an X rocker arm (107) is vertically connected to the X rotating shaft (108), and a Y rocker arm (105) is vertically connected to the Y rotating shaft (104); the tail end of the X rocker arm (107) is fixedly connected with an X restraint unit (35), and the tail end of the Y rocker arm (105) is fixedly connected with a Y restraint unit (34);
    the detection device also comprises an X semi-circular arc PCB (32) and a Y semi-circular arc PCB (33) which are waiting for detection and have the same structure, wherein the X semi-circular arc PCB (32) and the Y semi-circular arc PCB (33) are respectively constrained on the X constraining unit (35) and the Y constraining unit (34);
    the rotation of the X rotating shaft (108) can drive the X restraint unit (35) to rotate along the axis of the X rotating shaft (108) through the X rocker arm (107);
    the rotation of the Y rotating shaft (104) can drive the Y constraint unit (34) to rotate along the axis of the Y rotating shaft (104) through the Y rocker arm (105).
  2. 2. The combined vision inspection system for PCB circuit board production of claim 1, wherein:
    when the X semi-circular-arc PCB (32) is restrained in the X restraining unit (35), the X semi-circular-arc PCB (32) can only freely rotate along the circle center of the X semi-circular-arc PCB;
    when the Y semi-circular PCB (33) is constrained on the Y constraining unit (34), the Y semi-circular PCB (33) can only freely rotate along the center of the circle of the Y semi-circular PCB;
    recording two arc ends of the X semi-arc PCB (32) as two X arc ends (113), and recording two arc ends of the Y semi-arc PCB (33) as two Y arc ends (112);
    the device also comprises an arc PCB plate end limiter;
    the circular arc PCB end limiter enables two X circular arc ends (113) of an X semi-circular arc PCB (32) on the X constraint unit (35) to be overlapped under the axial view angle along the X rotating shaft (108);
    the circular arc PCB end limiter can enable two Y circular arc ends (112) of a Y semi-circular arc PCB (33) on the Y constraint unit (34) to be overlapped under the axis view angle along the Y rotating shaft (104).
  3. 3. The combined vision inspection system for PCB circuit board production of claim 2, wherein:
    on the basis that the X rocker arm (107) and the Y rocker arm (105) are both upward in the initial state, the X constraint unit (35) and the Y constraint unit (34) respectively drive the X semi-circular-arc PCB (32) and the Y semi-circular-arc PCB (33) to move to be spliced into a whole circular ring structure under the combined action of the anticlockwise rotation of the X rotating shaft (108), the clockwise rotation of the Y rotating shaft (104) and the end limiter of the circular-arc PCB; the system also comprises a fixedly mounted vision camera (131), and the vision camera (131) can shoot a local range (130) of the whole circular ring structure.
  4. 4. The combined vision inspection system of PCB circuit board production of claim 3, wherein: the mechanism is characterized by further comprising a mechanism base (110), wherein a motor support (111) is fixedly mounted on the mechanism base (110) through an upright post (112), and the machine shells of the X motor (106) and the Y motor (103) are respectively and fixedly mounted on the motor support (111); the vision camera (131) is fixed on the motor bracket (111) through a camera bracket (132); when the X semi-circular arc PCB (32) and the Y semi-circular arc PCB (33) move to be spliced into a whole circular ring structure, the vision camera (131) is just right below the arbitrary connection position of the X semi-circular arc PCB (32) and the Y semi-circular arc PCB (33).
  5. 5. The combined vision inspection system for PCB circuit board production of claim 4, wherein: the vision camera (131) is a CMOS camera.
  6. 6. The combined vision inspection system for PCB circuit board production of claim 4, wherein: the circular arc PCB end limiter comprises a lifter (109) fixed on the mechanism base (110), and the axis of a vertical lifting rod (102) of the lifter (109) passes through the circle center of a whole circular ring structure formed by splicing an X semi-circular arc PCB (32) and a Y semi-circular arc PCB (33);
    the vertical lifting rod (102) is fixedly connected with a long-strip limiting vertical plate (100), the length direction of the long-strip limiting plate (100) is parallel to the axis of the X rotating shaft (108)/Y rotating shaft (104), and the lower end of the long-strip limiting plate (100) is in a sharp shape (101) with a downward sharp end at the axis view angle along the X rotating shaft (108)/Y rotating shaft (104); two side surfaces of the long-strip-shaped limiting plate (100) are limiting surfaces (101.1);
    when two X arc ends (113) of the X semi-arc PCB (32) are in contact with a limiting surface (101.1) on the right side of the long limiting plate (100), the two X arc ends (113) of the X semi-arc PCB (32) are overlapped in an axis view along the X rotating shaft (108);
    when two Y circular arc tip (112) of Y semicircle PCB board (33) all contacted long banding limiting plate (100) left spacing face (101.1), two Y circular arc tip (112) of Y semicircle PCB board (33) coincide under the axis visual angle along Y pivot (104).
  7. 7. The combined vision inspection system for PCB circuit board production of claim 6, wherein: the X restraint unit (35) comprises an X restraint wheel bracket (16), and the X restraint wheel bracket (16) is fixed at the tail end of the X rocker arm (107); the device also comprises two X outer constraint rollers (17) and two X inner constraint rollers (15); the two X outer constraint rollers (17) and the two X inner constraint rollers (15) are rotatably arranged on the X constraint wheel bracket (16); the Y constraint unit (34) comprises a Y constraint wheel bracket (4), and the Y constraint wheel bracket (4) is fixed at the tail end of the Y rocker arm (105); the device also comprises two Y external constraint rollers (6) and two Y internal constraint rollers (7); the two Y external constraint rollers (6) and the two Y internal constraint rollers (7) are rotatably arranged on the Y constraint wheel bracket (4); the outer rings of the X outer constraint roller (17), the X inner constraint roller (15), the Y inner constraint roller (7) and the Y outer constraint roller (6) are all provided with annular wheel grooves (5), the groove bottoms of the wheel grooves (5) are all made of rubber elastic materials, and the width of each wheel groove (5) is consistent with the plate thickness of the X semicircular arc PCB (32) and the Y semicircular arc PCB (33); the outer arc edge of the X semi-circular PCB (32) is clamped into the wheel grooves (5) of the two X outer constraint rollers (17) and is matched with the two X outer constraint rollers (17) in a rolling way; the inner arc edge of the X semi-circular PCB (32) is clamped into the wheel grooves (5) of the two X inner constraint rollers (15) and is matched with the two X inner constraint rollers (15) in a rolling way; the outer arc edge of the Y semi-circular PCB (33) is clamped into the wheel grooves (5) of the two Y outer constraint rollers (6) and is matched with the two Y outer constraint rollers (6) in a rolling way; the inner arc edge of the Y semi-circular-arc PCB (33) is clamped into the wheel grooves (5) of the two Y inner constraint rollers (7) and is in rolling fit with the two Y inner constraint rollers (7);
    and the Y constraint wheel bracket (4) is fixedly provided with a roller driving motor (145) through an X motor bracket (146), and the roller driving motor (145) is in driving connection with any one Y inner constraint roller (7).
  8. 8. The operating method of the combined vision inspection system for PCB circuit board production of claim 7, wherein:
    step one, in an initial state, an X rocker arm (107) and a Y rocker arm (105) are both upward in the initial state;
    secondly, clamping the outer arc edge of the X semi-circular PCB (32) into the wheel grooves (5) of the two X outer constraint rollers (17) and in rolling fit with the two X outer constraint rollers (17), and clamping the inner arc edge of the X semi-circular PCB (32) into the wheel grooves (5) of the two X inner constraint rollers (15) and in rolling fit with the two X inner constraint rollers (15); therefore, the X constraint unit (35) can constrain the X semi-arc PCB (32); at the moment, two X arc end parts (113) of the X semi-arc PCB (32) are upward, and the X semi-arc PCB (32) can also freely rotate along the center of the circle, so that the X semi-arc PCB (32) is not completely positioned, and the two X arc end parts (113) of the X semi-arc PCB (32) are not completely superposed in the axial view along the X rotating shaft (108); at the moment, the X rotating shaft (108) is controlled to rotate anticlockwise, so that the X semi-arc PCB (32) restrained by the X restraining unit (35) also rotates anticlockwise along the axis of the X rotating shaft (108) until one of two X arc ends (113) of the X semi-arc PCB (32) contacts with the limiting surface (101.1) on the right side of the strip limiting plate (100), the limiting surface (101.1) can form a thrust force to one contacted X arc end part (113) to enable the X semi-arc PCB (32) to rotate along the circle center of the X semi-arc PCB, until the two X arc end parts (113) of the X semi-arc PCB (32) are contacted with the limiting surface (101.1) at the right side of the strip limiting plate (100), the two X arc ends (113) of the X semi-arc PCB (32) are overlapped under the axial view angle along the X rotating shaft (108), and the X semi-arc PCB (32) is completely positioned;
    meanwhile, the outer arc edge of the Y semi-arc PCB (33) is clamped into the wheel grooves (5) of the two Y outer constraint rollers (6) and is matched with the two Y outer constraint rollers (6) in a rolling way; the inner arc edge of the Y semi-arc PCB (33) is clamped into the wheel grooves (5) of the two Y inner constraint rollers (7) and is matched with the two Y inner constraint rollers (7) in a rolling way; therefore, the Y constraint unit (34) can constrain the Y semi-arc PCB (33); at the moment, two Y arc end parts (112) of the Y semi-arc PCB (33) are upward, and the Y semi-arc PCB (33) can also freely rotate along the circle center of the Y semi-arc PCB, so that the Y semi-arc PCB (33) is not completely positioned, and the two Y arc end parts (112) of the Y semi-arc PCB (33) are not completely superposed in the axis view angle along the Y rotating shaft (104); at the moment, the Y rotating shaft (104) is controlled to rotate clockwise, so that the Y semi-arc PCB (33) restrained by the Y restraining unit (34) also rotates clockwise along the axis of the Y rotating shaft (104) until one of two Y arc ends (112) of the Y semi-arc PCB (33) contacts with a limiting surface (101.1) on the left side of the strip-shaped limiting plate (100), the limiting surface (101.1) can form a thrust force on one contacted Y-shaped arc end part (112) to enable the Y-shaped semi-arc PCB (33) to rotate along the circle center of the Y-shaped semi-arc PCB, until the two Y-shaped arc end parts (112) of the Y-shaped semi-arc PCB (33) are contacted with the limiting surface (101.1) at the left side of the strip-shaped limiting plate (100), two Y arc ends (112) of the Y semi-arc PCB (33) are overlapped under the axial view angle along the Y rotating shaft (104), and the Y semi-arc PCB (33) is completely positioned;
    step three, controlling the long-strip limiting vertical plate (100) to gradually rise by the lifter (109), simultaneously controlling the X rotating shaft (108) to rotate anticlockwise and controlling the Y rotating shaft (104) to rotate clockwise, so that two X arc end parts (113) of the X semi-arc PCB (32) are always contacted with the limiting surface (101.1) on the right side of the long-strip limiting plate (100), and two Y arc end parts (112) of the Y semi-arc PCB (33) are always contacted with the limiting surface (101.1) on the left side of the long-strip limiting plate (100); because the lower end of the long strip-shaped limiting plate (100) is in a sharp shape (101) with a downward sharp end in the axial view along the X rotating shaft (108)/the Y rotating shaft (104), therefore, when the two X arc ends (113) of the X semi-arc PCB (32) and the two Y arc ends (112) of the Y semi-arc PCB (33) are gradually close to each other in the process that the long-strip-shaped limiting vertical plate (100) gradually rises until the lower end of the long-strip-shaped limiting plate (100) rises to be higher than the two X arc ends (113) of the X semi-arc PCB (32) and the two Y arc ends (112) of the Y semi-arc PCB (33), two X arc ends (113) of the X semi-arc PCB (32) and two Y arc ends (112) of the Y semi-arc PCB (33) are already contacted with each other, at the moment, the X semi-arc PCB (32) and the Y semi-arc PCB (33) are just spliced into a whole circular ring structure; if the X semi-arc PCB (32) and the Y semi-arc PCB (33) cannot be spliced into a whole circle, at least one of the X semi-arc PCB (32) and the Y semi-arc PCB (33) is incorrect in size; after the X semi-arc PCB (32) and the Y semi-arc PCB (33) are spliced into a whole circular ring structure, the whole circular ring structure is formed by splicing the X semi-arc PCB (32) and the Y semi-arc PCB (33), and the whole circular ring structure can only rotate along the center of the circle of the whole circular ring structure under the common constraint of the X constraint unit (35) and the Y constraint unit (34);
    step four, starting the visual camera (131), and shooting a local range (130) of a whole circular ring structure by the aid of the visual camera (131), wherein the X semi-circular arc PCB (32) and the Y semi-circular arc PCB (33) are spliced, so that a plate surface image of the local range (130) of the whole circular ring structure is obtained by the visual camera (131); the roller driving motor (145) is controlled, the roller driving motor (145) drives a Y inner constraint roller (7) to rotate, so that the Y inner constraint roller (7) drives the X semi-circular arc PCB (32) and the Y semi-circular arc PCB (33) to be spliced under the action of rolling friction force to rotate the whole circular ring structure along the circle center of the Y inner constraint roller, the X semi-circular arc PCB (32) and the Y semi-circular arc PCB (33) are spliced to form the whole circular ring structure, after the whole circular ring structure rotates along the circle center of the Y inner constraint roller, the visual line range of the vision camera (131) sweeps the complete lower surface of the whole circular ring structure formed by splicing the X semi-circular arc PCB (32) and the Y semi-circular arc PCB (33), so that the front vision camera (8) and the back vision camera (10) obtain complete images of the lower surface of the whole circular ring structure, and then the images are transmitted to an image processing system or a display screen, and the judgment of human eyes are replaced to judge each component on the X semi-circular arc PCB (32) and the Y semi-circular arc PCB (33) Whether the spacing is wrong, the shape of the element, and whether there is contamination on the board, thus realizing a period of visual inspection of the device.
CN202110907180.1A 2021-08-09 2021-08-09 Combined visual inspection system and working method for PCB production Withdrawn CN113607733A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110907180.1A CN113607733A (en) 2021-08-09 2021-08-09 Combined visual inspection system and working method for PCB production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110907180.1A CN113607733A (en) 2021-08-09 2021-08-09 Combined visual inspection system and working method for PCB production

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Publication Number Publication Date
CN113607733A true CN113607733A (en) 2021-11-05

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CN202110907180.1A Withdrawn CN113607733A (en) 2021-08-09 2021-08-09 Combined visual inspection system and working method for PCB production

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